How to connect local networks OpenVPN or L2TP or PPTP?

Question

VPN

Good afternoon!
There is a local network with access to the Internet - dacha (192.168. 8.0 / 24)
There is a local network with access to the Internet - house (192.168. 1.0 /24) White IP
It is necessary to combine them in order from 192.168. 8.0 was visible 192.168. 1.0 /24 and vice versa.
Picked up Linux Debian on OrangePiZero installed OpenVPN there Or L2TP (one meaning)
Put it behind the Router (192.168. 8.1 ) in the network 192.168 .
From home, I can access OrangePI via ssh or Web. (the same if you put a regular router with a web interface, etc.) gets the address 10.8.0.6 in the case of OpenVPN or 10.8.0.2 in the case of an L2TP connection
But I can't see the 192.168 network from home. 8 .0/24, logging in via SSH to tun0 10.8.0.6 (192.168.8.100 eth0 ) of course I ping the entire network in the country.
How and where to register the route in order to see the network from the house in the country.
Thanks
PS as a VPN client, I can use a router with PADAVAN firmware instead of OrangePi (if you can configure it through it, it would be better.)

Answer 1

For country devices, you need to register the route home through 192.168.8.100.
And according to the normal - you need to pass VPN between routers so that there is one router in the LAN. Registering routes on all devices on the network is not comme il faut.